The present technology relates to an optical apparatus and an information processing method capable of more easily obtaining an indicator value. In the optical apparatus according to the present technology, irradiation light including a predetermined irradiation wavelength band is emitted, first reflected light being a reflected light in a first wavelength band obtained by reflection of the emitted irradiation light on a predetermined object and second reflected light being reflected light in a second wavelength band obtained by reflection of the irradiation light on the object are received at a plurality of pixels; and a value of a predetermined indicator relating to a region in a predetermined range of the object is obtained on the basis of a received light amount of each of the received first reflected light and the received second reflected light. For example, the present technology can be applied to optical apparatuses, electronic apparatuses, imaging apparatuses, and information processing apparatuses.